Passage Summary: Early humans needed high-fat foods to grow big brains, and those foods were most common by the water. However, human brains actually evolved while we were living in the woods and plains instead.

Reasoning: The evolution of the modern human brain required high-calorie, fatty diets found most reliably in shore environments, yet this evolution occurred almost entirely in savanna and woodland areas.

Analysis: The conflict here is between a biological requirement (shore-based nutrition) and a geographical reality (savanna/woodland evolution). To resolve this, we need a way to get those 'shore-like' nutrients into the savanna, or a reason why the savanna was actually sufficient. Perhaps certain savanna animals provided the necessary fats, or perhaps the ancestors lived in areas where both environments were accessible. Look for an answer that makes the high-calorie requirement attainable within the savanna or woodland setting.